main
Ray Set visibility: public ffd5c8c 12d ago
{
  "schema_version": 1,
  "type": "component",
  "slug": "bc857at-7-f",
  "title": "BC857AT-7-F",
  "brief": "Diodes Incorporated Bipolar Transistors - BJT, SOT-523. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
  "version": "0.1.0",
  "license": "CC-BY-SA-4.0",
  "tags": [
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    "transistors",
    "bc857at-7-f",
    "factory-2.0.0",
    "extractor-text"
  ],
  "component": {
    "mpn": "BC857AT-7-F",
    "manufacturer": "Diodes Incorporated",
    "package": "SOT-523",
    "pin_count": 3,
    "category": "Transistors",
    "subcategory": "Bipolar Transistors - BJT",
    "datasheet": "https://www.diodes.com/assets/Datasheets/BC857AT-7-F.pdf",
    "parts": {
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      "footprint": "bc857at-7-f.kicad_mod",
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      "model_3d_plain": "bc857at-7-f-etched.glb",
      "model_3d_step": "bc857at-7-f-etched.step",
      "model_3d_step_plain": "bc857at-7-f.step",
      "lbr": "bc857at-7-f.lbr"
    },
    "distributor_links": {
      "lcsc": "C2760571",
      "digikey": "BC857AT-FDITR-ND",
      "mouser": "621-BC857AT-7-F"
    },
    "distributor_check": {
      "checked_at": "2026-10-24T00:11:08Z",
      "source": "Component Ocean /api/assign-pns",
      "digikey": {
        "pn": "BC857AT-FDITR-ND",
        "status": "found",
        "lifecycle": "Active"
      },
      "mouser": {
        "pn": "621-BC857AT-7-F",
        "status": "found"
      }
    },
    "pins": [
      {
        "number": "1",
        "name": "B",
        "type": "input",
        "description": "Base of the PNP transistor; the pin-out top view shows it at the bottom left of the package."
      },
      {
        "number": "2",
        "name": "E",
        "type": "passive",
        "description": "Emitter of the PNP transistor; the pin-out top view shows it at the bottom right, and VEBO is rated at -6V."
      },
      {
        "number": "3",
        "name": "C",
        "type": "passive",
        "description": "Collector of the PNP transistor, on the single-lead side of the package; IC is rated at -100mA and VCEO at -45V."
      }
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        "primary_model": "claude-sonnet-5-5",
        "primary_mode": "text+vision",
        "consensus_model": "claude-opus-5-5",
        "consensus": "agreed",
        "guards": "pin_guards 0.1: passed",
        "guard_notes": [
          "extractor flagged: The pin-out drawing labels C, B and E by position but prints no pin numbers. Numbers 1 (B), 2 (E) an",
          "vision extraction: provenance cannot be text-verified; needs consensus"
        ],
        "pages_sent": 6,
        "cost_usd": 0.1404,
        "at": "2026-10-24T00:10:44"
      },
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        "pages": 6,
        "sha256": "44f38498f6f42233",
        "source_tier": "mfr"
      },
      "cad": "KiCad official (CC-BY-SA 4.0)",
      "pins": {
        "total": 3,
        "described": 3,
        "cites_pages": true,
        "refuses_to_fabricate": true
      }
    },
    "viewers": {
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        "role": "plain",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        ],
        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "af7e123df2c6c21dde5e3d7c201e2c668f13b454043adfb13427b16fb9732243",
        "checked": "2026-10-24",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      },
      {
        "file": "bc857at-7-f-etched.step",
        "role": "eda",
        "up": "Z",
        "units": "mm",
        "origin": "footprint origin = pad-pattern centre",
        "seat": "z = 0",
        "extents_mm": [
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        "zmin_mm": 0,
        "centre_offset_mm": 0,
        "footprint_binding": "identity",
        "sha256": "522bea05168023e1a3fa6827a766258e09df124d669ef74320218ad942e65131",
        "checked": "2026-10-24",
        "checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
      }
    ]
  },
  "metadata": {
    "specs": {
      "Manufacturer": "Diodes Incorporated",
      "Package": "SOT-523",
      "Category": "Transistors",
      "Pins": "3"
    },
    "appearance": {
      "contacts": {
        "quote": " Terminals: Finish – Matte Tin Plated Leads. Solderable per MIL-STD-202, Method 208",
        "page": 1,
        "doc": "ds.pdf",
        "plating": "tin"
      },
      "version": 1,
      "datasheet_sha256": "44f38498f6f422334d572102d170dcb789c4e0f2ad3d9a82ffd2f26f1ded9745"
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    "characteristics": {
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          "name": "Collector-Base Breakdown Voltage",
          "symbol": "BVCBO",
          "kind": "electrical",
          "unit": "V",
          "min": -50,
          "typ": null,
          "max": null,
          "conditions": "IC = -100µA, IE = 0",
          "source_page": 3,
          "source": "datasheet"
        },
        {
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          "min": -45,
          "typ": null,
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          "conditions": "IC = -1mA, IB = 0",
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          "source": "datasheet"
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          "source_page": 3,
          "source": "datasheet"
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          "name": "DC Current Gain (A grade)",
          "symbol": "hFE",
          "kind": "electrical",
          "unit": "",
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        {
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          "kind": "electrical",
          "unit": "µA",
          "min": null,
          "typ": null,
          "max": -4,
          "conditions": "VCB = -30V, TA = +150°C",
          "source_page": 3,
          "source": "datasheet"
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        {
          "name": "Output Capacitance",
          "symbol": "COBO",
          "kind": "electrical",
          "unit": "pF",
          "min": null,
          "typ": null,
          "max": 4.5,
          "conditions": "VCB = -10V, f = 1MHz",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Current Gain-Bandwidth Product",
          "symbol": "fT",
          "kind": "electrical",
          "unit": "MHz",
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          "typ": null,
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          "source_page": 3,
          "source": "datasheet"
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          "kind": "electrical",
          "unit": "dB",
          "min": null,
          "typ": null,
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          "conditions": "IC = -0.2mA, VCE = -5V, RS = 2kΩ, f = 1MHz, BW = 200Hz",
          "source_page": 3,
          "source": "datasheet"
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          "symbol": "VCBO",
          "kind": "absolute_maximum",
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          "typ": null,
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          "conditions": "TA = +25°C",
          "source_page": 2,
          "source": "datasheet"
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        {
          "name": "Collector-Emitter Voltage",
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          "conditions": "TA = +25°C",
          "source_page": 2,
          "source": "datasheet"
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        {
          "name": "Emitter-Base Voltage",
          "symbol": "VEBO",
          "kind": "absolute_maximum",
          "unit": "V",
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          "typ": null,
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          "conditions": "TA = +25°C",
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        {
          "name": "Collector Current",
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          "unit": "mA",
          "min": null,
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          "source_page": 2,
          "source": "datasheet"
        },
        {
          "name": "Power Dissipation",
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          "unit": "mW",
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          "typ": null,
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          "conditions": "Note 5, TA = +25°C",
          "source_page": 2,
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        {
          "name": "Operating and Storage Temperature Range",
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          "typ": null,
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          "conditions": "",
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        {
          "name": "Thermal Resistance, Junction to Ambient",
          "symbol": "RθJA",
          "kind": "thermal",
          "unit": "°C/W",
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          "typ": 833,
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          "name": "ESD Human Body Model",
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          "conditions": "JEDEC Class 3A",
          "source_page": 2,
          "source": "datasheet"
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        {
          "name": "ESD Machine Model",
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          "kind": "absolute_maximum",
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          "max": null,
          "conditions": "JEDEC Class C",
          "source_page": 2,
          "source": "datasheet"
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        {
          "name": "Base-Emitter Saturation Voltage",
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          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": -700,
          "max": null,
          "conditions": "IC = -10mA, IB = -0.5mA",
          "source_page": 3,
          "source": "datasheet"
        },
        {
          "name": "Base-Emitter Saturation Voltage",
          "symbol": "VBE(SAT)",
          "kind": "electrical",
          "unit": "mV",
          "min": null,
          "typ": -900,
          "max": null,
          "conditions": "IC = -100mA, IB = -5mA",
          "source_page": 3,
          "source": "datasheet"
        }
      ]
    }
  },
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    "viewers",
    "readme",
    "breadcrumbs",
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  "discovery_triggers": [
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  ],
  "discovery_pitch": "BC857AT-7-F (Diodes Incorporated) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
  "author": {
    "name": "Ray",
    "email": "[email protected]"
  },
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}